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AT89C51ID2-RDTIM Datasheet(PDF) 79 Page - ATMEL Corporation

Part # AT89C51ID2-RDTIM
Description  8-bit Flash Microcontroller
PDF  159 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51ID2-RDTIM Datasheet(HTML) 79 Page - ATMEL Corporation

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AT89C51ID2
4289A–8051–09/03
Table 59. KBE Register
KBE-Keyboard Input Enable Register (9Dh)
Reset Value= 0000 0000b
7654
3210
KBE7
KBE6
KBE5
KBE4
KBE3
KBE2
KBE1
KBE0
Bit
Number
Bit
Mnemonic
Description
7KBE7
Keyboard line 7 Enable bit
Cleared to enable standard I/O pin.
Set to enable KBF. 7 bit in KBF register to generate an interrupt request.
6KBE6
Keyboard line 6 Enable bit
Cleared to enable standard I/O pin.
Set to enable KBF. 6 bit in KBF register to generate an interrupt request.
5KBE5
Keyboard line 5 Enable bit
Cleared to enable standard I/O pin.
Set to enable KBF. 5 bit in KBF register to generate an interrupt request.
4KBE4
Keyboard line 4 Enable bit
Cleared to enable standard I/O pin.
Set to enable KBF. 4 bit in KBF register to generate an interrupt request.
3KBE3
Keyboard line 3 Enable bit
Cleared to enable standard I/O pin.
Set to enable KBF. 3 bit in KBF register to generate an interrupt request.
2KBE2
Keyboard line 2 Enable bit
Cleared to enable standard I/O pin.
Set to enable KBF. 2 bit in KBF register to generate an interrupt request.
1KBE1
Keyboard line 1 Enable bit
Cleared to enable standard I/O pin.
Set to enable KBF. 1 bit in KBF register to generate an interrupt request.
0KBE0
Keyboard line 0 Enable bit
Cleared to enable standard I/O pin.
Set to enable KBF. 0 bit in KBF register to generate an interrupt request.



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